Th best way to improve user experience is to first understand who is your user! I am surprised to see how Apple has ruined(no offense to Steve Jobs) the whole concept about a startup figuring out its customers. Fine agreed, that an Apple Ipod is meant for 4 to "time you die" years of person, but in reality for a startup to grow has to stay focussed because it simply brings in mediocrity which leads to mediocre user experience and finally lowers the barriers to entry. So its always great to focus small, satisfy early adoptors appetite and then roll out big. At the end of the day, it is going to be the early adoptors who are going to decide your product's future to a great extent!